公开(公告)号：US20090322700A1

公开(公告)日：2009-12-31

申请号：US12165243

申请日：2008-06-30

申请人： HENRY M. D'SOUZA ,  RaeAnne L. Dietz ,  JOEL C. KENT ,  DETELIN MARTCHOVSKY ,  JAMES R. WYNNE, JR.

发明人： HENRY M. D'SOUZA ,  RaeAnne L. Dietz ,  JOEL C. KENT ,  DETELIN MARTCHOVSKY ,  JAMES R. WYNNE, JR.

IPC分类号： G06F3/045

CPC分类号： G06F3/045 ,  G06F3/04883 ,  G06F2203/04104 ,  G06F2203/04808

摘要： Resistive touchscreen system has substrate and coversheet with first and second conductive coatings. The substrate and coversheet are positioned proximate each other such that the first conductive coating faces the second conductive coating. The substrate and coversheet are electrically disconnected with respect to each other in the absence of a touch. First set of electrodes is formed on the substrate for establishing voltage gradients in first direction. Second set of electrodes is formed on the coversheet for establishing voltage gradients in second direction wherein the first and second directions are different. Controller biases the first and second sets of electrodes in first and second cycles and senses a bias load resistance associated with at least one of the sets of electrodes. The bias load resistance has a reference value associated with no touch. A decrease in the bias load resistance relative to the reference value indicates two simultaneous touches.

摘要翻译： 电阻式触摸屏系统具有带有第一和第二导电涂层的基片和覆盖片。 衬底和覆盖片彼此靠近定位，使得第一导电涂层面向第二导电涂层。 在没有触摸的情况下，基板和盖板彼此相互电断开。 第一组电极形成在基板上，用于在第一方向上建立电压梯度。 第二组电极形成在盖片上，用于在第二方向上建立电压梯度，其中第一和第二方向不同。 控制器在第一和第二周期中偏置第一和第二组电极，并感测与至少一组电极相关联的偏置负载电阻。 偏置负载电阻具有与无触摸相关联的参考值。 相对于参考值的偏置负载电阻的减小表示两个同时触摸。

公开(公告)号：US20090109195A1

公开(公告)日：2009-04-30

申请号：US11925264

申请日：2007-10-26

申请人： JOEL C. KENT ,  ROBERT J. WARMACK

发明人： JOEL C. KENT ,  ROBERT J. WARMACK

IPC分类号： G06F3/041

CPC分类号： G06F3/0418 ,  G06F3/045

摘要： A computer readable medium has instructions to calibrate a touch system by detecting touch points on a touchscreen that are each associated with touchscreen coordinates in a touchscreen coordinate system. The instructions associated each of the touch points with known calibration targets, and each of the calibration targets has display coordinates in a display coordinate system that is associated with at least one of a display screen and an operating system. The instructions fit the display coordinates and the touchscreen coordinates non-linearly with respect to each other based on a generalized Laplace-constrained fit that is used to identify correction parameters used to map a user generated run-time touch point on the touchscreen to a display coordinate location on a display screen. The correction parameters represent non-linear corrections.

摘要翻译： 计算机可读介质具有通过检测触摸屏上的每个与触摸屏坐标系中的触摸屏坐标相关联的触摸点来校准触摸系统的指令。 每个触摸点与已知的校准目标相关联的指令，以及每个校准目标在与显示屏幕和操作系统中的至少一个相关联的显示坐标系中具有显示坐标。 所述指令基于广义的拉普拉斯约束拟合来适应非线性的显示坐标和触摸屏坐标，该广义拉普拉斯约束拟合用于识别用于将触摸屏上的用户生成的运行时间触摸点映射到显示器的校正参数 在显示屏上坐标位置。 校正参数表示非线性校正。